Improvement in nut-locks



-the surface of the washer.

UNITED STATEs PATENT OFFICE.

HARRISON r. IIooD, OE INDIANAPOLIS, INDIANA.

IMPROVEMENT IN NUT-LOCKS.

Specification forming part o f Letters Patent No. 146,532, dated January 20, 1874; application filcdA December 3l, 1873 To all whom it may concern:

Be it known that I, HARRISON P. HOOD, of

Indianapolis, State oi' Indiana, have invented an Improvement in Nut-Locks, of which the following is a specification:

The object ot' my invention is to improve a nut-lock invented by myself and William i Coombs, of Bangor, State of Maine, for which below the proper position for l'iolding the nut k.

Fig. 2 is a view ot' niy improvement, which consists in forming a second stop, c2, which, instead of being rigid like the stop e, is made with a spring, so that it can be easily forced down ush withy the surface of the washer d, and, on being released, will raise itself above The object of this springstop e2 is to lock the button a (shown in dotted lines in Fig. 2) when it is in position for holding the nut, the button being held be device as shown in Fig. lf, that the button t is liable to be accidentally raised by the heavy jarrin g of passing trains, or otherwise, and also that it must be kept in an upright position, so that the force of gravitation will operate to keep the button in place when holding the nut, thus limiting its use to such places as its functions will not be disturbed by the force of gravitation.

With my improvement it is impossible to displace the button, and thus release the nut, except designedly, without regard to the force of gravitation, thus greatly increasing the security of the lock, and extending the ield of its usefulness.

Fig. 3 is an end view.

I claim as my invention- The springstop e2, in combination with the button a and rigid stop e, for the purpose heren set forth.

HAREisON r. HOOD.

Witnesses: l

GEORGE W. J osEPH, AARON W. HIBBERD. 

